研究成果の概要（和文): 原子力発電所などを運用することにより難燃性廃棄物が発生する. この廃棄物を超臨界水あるいは亜臨界水により分解し減容処理するとともに廃棄物由来の液体燃料を生成する研究を実施した. 研究の結果, 現在, 日本原燃株式会社低レベル放射性廃棄物埋設処理センターでも受け入れられないゴム手袋は, ほぼ完全に減容できた. 得られた油分の品質は原油相当であった. グリーンケミストリーの観点から, 水を再利用する研究も実施した結果, 水を再利用しても, 難燃物由来の油分の品質は原油相当であった. 研究成果の概要（英文): In nuclear power stations, rubber groves and tapes made of polyvinyl chloride are used to minimize the radiation damage of workers. Once-through use is applied for these materials in spite of the incombustibility and, therefore, each site has recently suffered from increases in the amount of incombustible wastes. To overcome the problem, decomposition of such incombustible solid materials was examined by using supercritical or subcritical water in this study. One of the advantages of this method is that nothing except water should be added for the treatment, which greatly contributes to the suppression of generation of the secondary wastes. As a result of the experiments, these materials were found to be decomposed to liquid under some conditions. In addition, an IR analysis identified the liquid as some forms of natural oil. This means that the proposed method is promising not only to the decomposition of incombustible wastes but also to the recovery of useful fuels.
難燃性廃棄物の飛躍的減容と液体燃料生成に関する技術開発
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